MBBChir MD FRCP
Live bookings available
35 years of experience
Bushey, WD23 1RD
(+3 more)
52 connections in healthcare
Skill endorsed
by Dr Akeel Alisa, Dr Melanie Romain and 5 other professionals
Live bookings available
35 years of experience
Bushey, WD23 1RD
(+3 more)
52 connections in healthcare
Skill endorsed
by Dr Akeel Alisa, Dr Melanie Romain and 5 other professionals
Areas of expertise
Contact
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Dr Jonathan Katz is a Consultant in Diabetes & Endocrinology, based at Barnet Hospital, which is part of the The Royal Free London NHS Trust. He has over 30 years experience in treating patients with Thyroid problems, Pituitary disorders, Diabetes and other hormone imbalances including Calcium disorders, Menopause, Testosterone Deficiency and Addison's Disease.
Dr Katz studied medicine at Cambridge University and University College London, qualifying in 1991. He specialised in Endocrinology, completing registrar training at UCLH, the Whittington Hospital and the Royal Free Hospital. During higher training he undertook a two year research fellowship for his MD thesis on polycystic ovary syndrome. Following that, he worked for 1 year as a registrar in Sydney, Australia before returning to teh Royal Free Hospital for his final resgistrar year. Dr Katz was appointed as a Consultant in Diabetes and Endocrinology in 2002.
Dr Katz works as a Consultant Endocrinologist for the Royal Free London NHS Foundation Trust, based at Barnet Hospital. In 2009, he was elected as a Fellow of the Royal College of Physicians (FRCP), an honour granted to consultants providing the highest standards of care. In 2019, Dr Katz was appointed as Regional Advisor for the Royal College of Physicians – this is an elected post with wider responsibilities : supporting training, ensuring new consultant posts fulfil Royal College standards, chairing regional conference updates for physicians and appointing College Tutors.
Dr Katz has a busy NHS Endocrinology practice, seeing over 300 new patients and over 1000 follow-up patients each year. In addition, he looks after inpatients at Barnet Hospital with diabetes emergencies and acute endocrine disorders.
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General Medical Council
No. 3490022
University of Cambridge
Medicine
Graduated 1991
New appointment
£295Follow-up appointment
£195Heathbourne Road, Bushey, United Kingdom, WD23 1RD
Chase Farm, Enfield, United Kingdom, EN28SD
Cavell Drive, Uplands Park Rd, Enfield, London, United Kingdom, EN2 7PR
290 Centennial Ave, Elstree Borehamwood, London, United Kingdom, WD6 3SU
Areas of expertise
Contact
Book online
This summary was created by AI based on recent reviews
Dr Jonathan Katz is a knowledgeable and professional specialist who ensures patients feel listened to and fully understand their treatment. He provides clear explanations, taking time to address individual needs and concerns without rushing consultations. Patients commend his methodical approach to diagnosis, comprehensive follow-up care, and effective coordination with other medical teams. Patient feedback highlights his significant expertise in managing thyroid conditions and regulating blood glucose.
I felt I was listened to and that there is a solution to the problem I have had.
I went to see Dr Katz for a private consultation after I was referred through my NHS GP, but was still waiting for an NHS consultation after 6 months with no appointment. He was very polite, patient and listened to my history without interrupting. He took his time with his investigation and we sat and discussed options. He gave a diagnosis and treatment advice. He was aware that I was self funding and gave suggestions regarding the most economical way of moving forward. Overall a very positive experience and I would definitely recommend.
Consultant was very patient and informative. Maintains a person centred approach to his practice which is very positive. I am happy with the service provided and wish to continue receiving such support.
Dr Katz came highly recommended, and rightly so. I have been extremely impressed and delighted with every aspect of his care. I am so pleased with the outcome of visiting Dr Katz and would highly recommend him.
Dr Katz was very thorough and easy to talk to. He commented very quickly with results and reports and gave us time to ask questions . Can recommend
I am 64years old mam with not previous history of illness and have tried to look after my self. However, following an insect bite on face, it seems to have triggered my Thyroid from over acting. My GP recommended Dr Katz and following a short wait, it was worth seeing him. He was professional and asked good questions. He summarised well and answered all my questions. - Appointment was on time. At the end of the session, I was clear about the next steps and felt I was in "good hands".
I have been under the care of Dr Katz following my thyroidectomy in December 2025, and I couldn’t recommend him highly enough. He is extremely knowledgeable and thorough, he listens to my concerns and takes my individual needs into consideration. He has been instrumental in helping to keep my thyroid levels well monitored and appropriately managed following my surgery. He also communicates and liaises very well with my other doctors, which has made the whole process feel a lot more reassuring. He is always pleasant, approachable and easy to deal with. I am very grateful for the support and expertise he has provided throughout my treatment.
Dr Katz is very patient and communicates well with my oncology team which is essential. He is great at listening to any concerns I have and looking at things as a whole and working out what is best for me.
Dr Katz is extremely helpful and personable. He has treated me more as an old friend than just a patient. He is an absolute pleasure to consult
A remarkable colleague with excellent skills and knowledge. Much admired and appreciated by patients and families
20 Aug 2026
Dr Akeel Alisa
GastroenterologistDr Katz is an excellent and knowledgeable endocrinologist who I have known for many years. I would not hesitate to recommend him
03 Jun 2026
Dr Melanie Romain
Geriatric DoctorI have known Dr Katz for many years and can say with confidence that he is a skilled, trustworthy endocrinologist
19 May 2026DK
Dr Felicity Kaplan
Diabetes & Endocrinology SpecialistDr Katz consistently provides a top tier opinion on all aspects of endocrinology and diabetes. He has excellent clinical skills and patients I have referred him always receive great care. I have no hesitation in recommending him.
09 Apr 2026
Dr Kwok Tang
Gastroenterologist
What are Dr Jonathan Katz's reviews like?
Dr Jonathan Katz's overall patient rating is 5 out of 5 stars on Doctify. This is based on 51 reviews.
What languages does Dr Jonathan Katz speak?
Dr Jonathan Katz speaks English
Where is Dr Jonathan Katz located?
Dr Jonathan Katz primarily practices at Spire Bushey Hospital, located at Heathbourne Road, Bushey, United Kingdom, WD23 1RD
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What are Dr Jonathan Katz working hours?
Dr Jonathan Katz is working Wednesday (16:00 - 18:00), Thursday (15:00 - 17:00)
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Does Dr Jonathan Katz accept new patients?
Dr Jonathan Katz generally accepts new patients.
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